My Bose NC700 can only remember 3 devices it seems. My work laptop puts it just over the limit, meaning I have to repair whenever I want to switch to another device, and it forgets one as a result (idk how it works, FIFO?). Pairing often takes a few tries.

Earphone quality drops to something awful whenever the mic is in use. That's just cause of the BT standard. This gets more complicated with multiple devices involved.

I'll be listening to music on my work laptop with my headphones, my iPhone will get a call, it'll switch to the iPhone to play a ringtone in my ears, then when I accept the call it'll switch to the iPhone's earpiece instead of my headphones.

Then some unpredictable things. Like it gets stuck connected to the wrong device, or it starts playing music when I turn them on, or it won't connect even with a device it should remember.

I don't fault Bose for any of this. These are the most reliable BT headphones I've ever owned. The standard just sucks.